Migration from .NET Framework to modern .NET

The problem

Thousands of companies run their business on .NET Framework 3.5 / 4.x applications: WebForms, WCF, WinForms, even VB.NET. These applications still work, but the foundation is aging: no more new features from Microsoft, blocked dependencies, hiring difficulties, and growing pressure on security.

Many IT departments are convinced a migration would be too risky, too long or too expensive — and postpone it year after year. That's exactly where we come in: migration is rarely impossible, and almost always more affordable than feared.

Our approach: progressive, never "big bang"

1. Existing code audit: inventory of dependencies, obsolete APIs (System.Web, WCF, remoting...), third-party libraries and their availability on modern .NET. You receive a clear assessment and a realistic cost estimate.
2. Incremental migration: with the Strangler Fig pattern, we isolate and migrate modules one by one. The current application keeps running during the migration — no interruption for your users.
3. Targeted modernization: WinForms → Blazor or ASP.NET Core web application, WebForms → Razor/Blazor, WCF → REST APIs or gRPC. We take the opportunity to improve what needs improving, without rewriting everything.
4. Supported go-live: regression testing, phased cutover, and knowledge transfer to your team.

What you gain

• Performance: modern .NET is several times faster than .NET Framework, with nearly identical code
• Cross-platform: Linux, containers, cloud — your application is no longer locked into Windows Server
• Longevity: a platform supported through 2030+, with the latest advances of the C# language
• Security: up-to-date patches, modern authentication (OpenID Connect, MFA)

Who is it for?

Any company whose .NET Framework business application "still runs just fine" but is becoming a risk. Contact us for an estimate: after the initial audit, you know exactly where you're heading, for what budget and what timeline.